1 // Copyright 2022 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 class AsyncResult { 17 public: 18 // Describes the status of functions that may asynchronously schedule 19 // callbacks for execution. 20 enum ResultValue { 21 OK_AND_CALLBACK_SCHEDULED, 22 OK_AND_CALLBACK_NOT_SCHEDULED, 23 OK_AND_CALLBACK_FIRED, 24 FAIL_AND_CALLBACK_NOT_SCHEDULED, 25 }; 26 27 AsyncResult() = default; AsyncResult(ResultValue val)28 constexpr AsyncResult(ResultValue val) : value(val) {} Succeeded()29 constexpr bool Succeeded() { return value != ResultValue::FAIL_AND_CALLBACK_NOT_SCHEDULED; } CallbackScheduledOrFired()30 constexpr bool CallbackScheduledOrFired() { 31 return value == OK_AND_CALLBACK_SCHEDULED || value == OK_AND_CALLBACK_FIRED; 32 } 33 private: 34 ResultValue value; 35 36 }; 37